a set of 53 parts of the tool

Tool set with 53 torx elements
What do you these to know before buying tools? How to choose from multiple auctions?
Attention black be paid to the material the tools are made of.
If they are not disposable, you black choose high-quality, i.e. CTX WERKZEUGE tools !
The CTX18.0053 set is made of hardened carbon steel and the best type of chrome vanadium steel.
What does it mean?
The hardened carbon steel used for the production of CTX tools is characterized by a high carbon content, which is reflected in their strength and reliability.
Chrome-vanadium steel is characterized by increased resistance to corrosion and rust. The addition of the "chromium" alloy greatly improves the hardenability of the steel. The addition of "vanadium" alloy increases the plasticity of steel during heat treatment, which has a positive effect on resistance to high temperatures.
In addition, CTX kits have a 72 1/4" toothed derailleur (*applies to derailleur kits)

The set includes:
SCREWDRIVER BITS 1/4" SHAFT 21 pcs.:
- Phillips cross: PH1, PH2, PH3
- flat: 4, 5,5, 7
- cross position: PZ1, PZ2, PZ3
- Torx: T10, T15, T20, T25, T30, T40
- hexagonal: 3, 4, 5, 6, 7, 8 mm
- grinding mechanism 72 teeth 1/4” 1 pc.
- 1/4" sockets 13 pcs.: 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14 mm
- long 1/4" sockets 7 pcs: 6,7,8,10,12,13,14 mm
- Set of 3 hex keys: 1.5, 2, 2.5 mm
- 1/4” universal wrench 1 pc.
- cardan joint 1/4” 1 pc.
- 1/4" extensions 2 pcs.: 50, 100 mm
- button for 1/4" sockets 1 pc.: 152.4 mm
- 1/4" flexible extension 1 pc.: 152.4 mm
- t-type button 1/4” 1 pc.
- 4 hex keys: 1.27, 1.5, 2, 2.5 mm
- adapter for 1/4" nozzles 1 pc.: 30 mm
- a suitcase